Soo, the scene is in his house? There shouldn't be any showering scene before the foreplay mode starts, so is this showering scene after the foreplay mode? What do you mean 'trying to use dialogue'? Does it mean using dirty talk phrases on Tocchan?
Sorry I meant like they'd just talked about showering after they stopped by the pharmacy and yes it's at his house. I was using the dirty talk phrases and it switched as soon as I clicked one to the screen where it shows the bar and love motel. I've closed the game and restarted from a save point, but the same thing continues to happens. I'll open it back up and see if I can screenshot the problem so you can maybe see what's happening.